There's nothing more kiwiana than a TIKI! Also the Tiki is commonly known as a good luck charm, so maybe having one on your wall will bring you lots of good luck.
I like the top half of this - "NZ Tiki Tour" Kiwiana art print by Jason Kelly for Sale - New Zealand Art Prints
WWI poster: The War-Dog of New Zealand (note Maori Tiki pendant on neck)
Tiki Tropical art print New Zealand Maori Tiki by SouthPacific
NZ Printmaker Greg Straight Pop Art Tiki by Greg Straight [Edition of Recently contemporary New Zealand printmaker Greg Straigh.
Drippy Tiki by Greg Straight New Zealand Art Prints
Tino Rangatiratanga Tiki by Robyn Kahukiwa. toi o tahuna.
One of the nicer Tikis I've seen in a while - Maori Culture Campaign by Karen Hamilton, via Behance - This is Hei Tiki :-)
Artwork - Marble Tiki by Joanne Webber
Tiki Mouse by Lester Hall, NZ artist